Printing apparatus and control method

A control method of a printing apparatus including:

• a supporting unit configured to support a conveyed print medium;
• a carriage in which a print head configured to perform printing by ejecting ink to the print medium is mounted, the carriage movable in a width direction of the print medium intersecting a conveyance direction of the print medium;
• a first detection unit provided on one side of the carriage in the width direction and capable of detecting an end portion of the print medium in the width direction;
• and
• a second detection unit provided on the other side of the carriage in the width direction and capable of detecting the end portion of the print medium in the width direction,
• at least one of the first detection unit and the second detection unit including:
• a light emitting unit configured to emit light to the supporting unit and the print medium supported on the supporting unit;
• a first light receiving unit capable of receiving reflected light from the supporting unit and the print medium supported on the supporting unit;
• and
• a second light receiving unit capable of receiving the reflected light from the supporting unit and the print medium supported on the supporting unit, the second light receiving unit overlapping the first light receiving unit in the conveyance direction and spaced apart from the first light receiving unit in the width direction, the control method comprising:
• causing the first detection unit to detect a first end portion located on the one side of the print medium in the width direction in execution of first printing in which the ink is ejected from the print head while the carriage is moved in a direction from the other side toward the one side in the width direction;
• and
• causing the second detection unit to detect a second end portion located on the other side of the print medium in the width direction in execution of second printing in which the ink is ejected from the print head while the carriage is moved in a direction from the one side toward the other side in the width direction.